A Proposed Methodology For Economizing Attitudinal Sample Surveys. مجلة المنصور, [S. l.], v. 10, n. 1, p. 20–48, 2023. Disponível em: https://www.journal.muc.edu.iq/journal/article/view/335. Acesso em: 1 أكتوبر. 2025.